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Radiators cold pressure OK

Timco Member Posts: 3,040
Try a good purge...THEN bleed. Check even the ones with the auto vents, as those things tend to fill with crud and stick, not always venting. Set to 12 psi cold and you should be fine.

Just a guy running some pipes.


  • JB_11
    JB_11 Member Posts: 1
    Radiators cold pressure OK

    I have a very old (I’m guessing 45 years) oil fired hot-water boiler. My problem is two radiators on my second floor (bedroom & bathroom) don’t get hot. If I crank up the thermostat to 75 degrees, one of the radiators will get warm about ¼ of the way up (I normally keep the thermostat at 68), the other remains ice cold. There is a large radiator with an automatic bleeder on it which throws off a lot of heat in another bedroom on the second floor. The bathroom radiator with the automatic bleeder is cold. The pressure on the boiler show 20 when cold and 23 when hot. When I bleed the bedroom radiator, air comes out but no water. All radiators on the 1st floor have been bled & water comes out.
    Last winter, the pressure was at 10 & I had the same problems, so I put on an automatic bleeder on the bathroom radiator to no avail. Any suggestions appreciated.
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